Radial-drill column-clamp control



. y 1 638,655 Aug 9 1927' J. 4c. CARLTON RAD'IAL DRILL COLUMN CLAMP CONTROL Fiied Jan. v. 1926 2 sheets-sheet 1 Aug.9, 1927. l 1,638,655

v A J. c. CARLTON V L RADIAL DRILL COLUMN CLAMP CONTROL Filed Jan. '7. 1926 2 Sheets-Sheet 2 25 tion... Cliriigv a clrillingfoprationfj the gravitational action or ainagiiet'armature, j'

patenten ug. 9, i927.

JACK o.

f TOOL Coli/riunir, .0F omarmtATI',V omo, A oonronnmionronono.

.lmiimniiiimg @cima-crimpciimiiirlf Aiiplieatioirlea ianiiiiiy 'This ii'lventiou relate'slto improvementsin lachlne "to`o'ls,` 'and is. particularly diy rented to fan electrolnagl'letic controlledide-r Vice for operating the clamping mechanism le" colunnli-"or` sleeve 'oiV a radial drill.

The invention is shown appliedv to that form of colul'nn clamp or friction clutch mechanism, .described inthe patent to J ack '0. Carlton forV -fli'ctionf clutch, Patent 1,557,241; oei'. 13,119.25;

A vgeneral yohjeict Vis to operate the Vcoluinn 1 Claim'ping mechanism @i iifalifil drill 'or equivalent clamping mechanis'- means. ofthe-movable Vcoreor armature' of an elec?,

'n0-magici.' iii@ wie being @cantate-Cl k with the clamping" mechanisnr'in a, manner to op vrate S'aidwniechanifsin in 'a pre determined manner Whfei'ijthecore ismoved-'lnnlther -lirec/ti'on. By the use loffaV device ofthls kinmahej clamping mechanism 'can "be elecj ii-ig operations;

iiorreleasing the clamping inechani'sni iiig those shorter vperiods VWhenthe'cli'."ill'ljlg l Q elements with ihe'slenoiaj iiifially Controlled vijqf C liiilpiiig finaiiilai, f n vSiae-irai Objectis tot claiiipihe @11min oi' a Liiiaial drilling manina; z @gaine maso that clamping power is applielvasfthe magnet-. "Thus the magnet is energized' only arm to. be swung to another position, electric power ls, used for short periods' only-` 'Other objects'and Certain advantages; anti featiires of the invention willA .belfidisclo inthe. description of. the clrawingsormlng a' part of this application and in z ings:

lFigure 1 is a general y'cfa `lrill; including a colunlr l .l clamping. ine'chfanisin showing my invention applied iorfoperat Vin ifsaicl mechanism'.

A'Figure y YFigure usalvertlcal 'Figure iis a. verticalfsec onon lille/1l.#14:,V

Figure 3,. fuiilie'r illustrating. the Ciampi@ means and elements for operating rthe "saine iiieroperafirig Figure 24 A is a vertical Section V on "line Figure 5 CARLTON, or CINCINNATI; oliio, Assmnon 'ro 'THE .CARLTON {iiiAo'iiiE fi n Figure 3, showing the" friction clamp for binding" Vto the base.

= frammenti@ lipibiriiarily is .i0 provide iml electric control forthe clamping mechanism or clamping the column or sleeve-1V umn or arm at a IjoointVV remote from the col# Y ironing. ille Circuit. man' el eratlf ".h.. LIP.H",y for the column lThe-far liet in the'v prsent instance.`

'lutch mechanism ture. orgthe magls mounted Vupon when iii@ mais ueeneigized so ihifiiiii aifiil and @iii-min Clamping jmeliiif construction',

' fihi-oi li' .iiijfalaise 10i;

eqn al' nt anclfliihirh will',

ht Or the ference to the A ordinary manual com With-jt of the= mechanism sufiicient makingan adgustment of the alimfthe'.,

control fis reduced yto a. minimum. I

mechanl the `alfm sleeYewo-r rotatable column' disclosed afore'sicl application "as a v giorni of imachine commerciali machin scribed in .sufficient ll with 'the head stoclrat arm; n thiscapacity circuit controlling' or norfinallyjy clamped .against rota# detailoo f of a rotatable'` column vor radial arm carry i mg .sleeve oi; a radialjdrill, adaptingtheop-V n erator to quickly/release and 'clamp' thecolnecessary for a clear understanding of the operation 'ofi the present invention and in so base plateof a machine tool, and kmounted .'iiponthe baseis a vertical column 2 of hollowconstruction. The column at the upper 'pai'jtl v of its pedestal portion' `is countery turned to telescopically or concentrically re- "ceive Athe hub' 3 ofthe drill` arm carrying sleeve 4, to provide a recess ror pocket betweenthe column and hub of the sleeve for thereception of ,thefriction clan'iping elementsiand to provide a rshoulderV 6 upon the column, asa supportvfor the clamping elements. ,Thev column below the shoulder l is annularly grooved as atjSrto receive thel .ends ofrscrews 9 engaged through the hub,

rvfor securing the sleeve lnpon Vthe columnv l .against vertical displacement but permitting the "sleevefto swivel or swing about'thek column. Friction rollers 12 have theirvaxes disposed vertically.Vv between the periphery of the'column and 'in the inner surface of Y .thehub "This column construction perse Y does'no't necessarily forma part of this invention,but is shown asa basisofillustra-v ktion for the clamping mechanism, which vmechanism can be'ofany preferred form.

The friction' clampingV mechanism interposed between thefcolumn and the hub of Athe sleeve, `comprises a vseries Yfof crescent shaped members, 1,5, A1o, 17. .'The crescent shaped 4mei'nber v15V hask its( 'outer' surfacey I A fconcentricfwith the inner surface ofthe Vhub 3 of the sleeve 4,' andv its inner surface eccentric thereto. The' opposite endsof this'member 15 overlap theftapered ends of opposy ingly related crescent-.or segmental wedge members 16, 17. The member 15 is heldl against circumferential sliding motion by a key 18. The inner surfaces of thev members 16, V17, are' concentric'with the outer surface l yof the column 2, and. areeccentricto. the

Y l innersurfaceof the member-15. `When the "I members 16, 17 are movedfin'expanding or Y opposite directions their ends are wedged ybe- /tween'fthe i outer periphery'y of the v'column and the innersurface ofthe wedge member l 15,"and'frictionally clamp .the partsitojgetheiz` j v 1` y The adjacent endsnof the members 16, k17,'

are 'each-'provided with a vtongue 20, lsaid vtongue adapted toY overlappasshown inV Fig- 1* [ure 4, `and topprovide portionsfoi1 connecting with the crank shaft. The: tongues have 'Y their inner'sides notched as atl-*21, to receive .aroller- 23 mountedupon aipini24 engaged in bores .inthe end" of the crank 'shaft 22,

4 j l the crankl shaft being journaledin thel bearings in they column.: :A- sleeve is vkeyed'to thejcranlry shaft-,tand has a cranli a'rm25 extending radially therefrom.y '.VVhen VVVthe been Afound .most effective. l

The ysolenoid can be of anypreferred type or make, and comprises a coil 35 anda movable core 36. `vThe solenoid is vertically shaft is rotated, the pins move inV opposite*V direction and the members 16, 17, are correspondingly moved, either to y clampingV or de-clampingpositions. The Acrank shaft is *oscillate'd by means'of a link 26 extending` ydownwardly within the pedestal, `and this vlink is connected fto an arm 27` extending from a horizontal rockshaft 28'. The outer end of 'this rock shaft is provided with aV hand lever 29 by whichfthe clamps may be operated ifv desired.

VMy yinvention consists however, in operat- 'ing the rock yshaft by'means of'an electroymagnetic device, and for this purpose an arm 30 is keyedto the rock shaft 528r and extends outwardly freely-through an openthis arm is flexibly connected with the projecting weighted `core `of an electro-magneticl solenoid. f

31 in thepedestal 2'.V The outerV end of Any preferred connections between, thez Y movable core of the solenoid, .and the' clamping mechanism ycan be used, but the `conneci Y tion herein 'illustrated and described has disposed, and` mounted "onH a hollow frame 37, which is`v clamped to the base 1 and to a of ythe base.v This vertical disposition of 95 f kbracket 38 extending` laterally from the side the solenoid' permitsthe core 36to drop by f gravity when the" solenoid' is, deenergized.

VIn order to positively loosen the core to ob.-

tain an acceleration ofA its gravitational movement, acompression spring 39 isinter- Y posedfbetweenthe coil and the lower endjofy the'cor'e.

f. The core ispreferably weighted, and the weight is removably attached toa counterturn`V portion 40 iat its lower "end, Thisy weight also actsas'a means for establishing loose connection betweenthe core and the column rclamp operating means. The couniii)` ter-turnedl portiony ofthe core is ld iametrin callyslottedas at 41 and the weight of the f two part construction. is yattached vtothis counter-turnedY Lportion in Vthe following manner yOne section of the weight is disposed lat each ,side of the counter-turnedV portion and ythe weight. sections are thusspaced apart, for

the reception ofthe outer ,endv of theclamping mechanism operating'l'ever 30. A' rod 45 12o' YVtraverses theV Weights andV counter-'turned portion 40 and a roller 116 is journaled upon this rod and is rotatable within thev slot; i Aj L second-roller 47 is interposed Ybe'tween'theweight sectionsflS near'thelower` end, and

is journaled `upon 'the tie rod 50 y'passing15:12.

,through thefsections. The rollers arespaced yapart gand 'an opening is' formed between the outer end of the lever 30 extends;v4 TheV ,the weight sections, into and'through which isp ' rollersl act as anti-friction devices and engage the lever at opposite sides'to raise and lower the; same. Thus,y the core is con- I`nected withthe ,clamping operating mechanism' -for lthe `gravity operation off'the mechanism'when the core is released, bvv

l deenergization of the coil.

vio

The application of my clamp operating device in a radialdrill isfparticularly'advantageous, inasmuchl as the solenoid `can be controlled from a `distantvpoint convenient to the operator, and further', con- A siderable electric power isesaved by'utilizing the gravitational force of the core to Vclamp the arm carrying' sleeve during af drilling operation,thus only using electric power'to release the c'lamp'by raising the core, and holding the clamp released whilethe tool is being brought to va new position.

Having described my invention,l I claim:

In a radial drill, a'column', an armcarry# and sleeve for r column, ,connections between said rock shaft sleeve. Y v

In wltness whereof, Irhereunto subscribe myrvname. f

" JAcK'ca- CARLTON;

ing sleeve concentricallyrengaged about and l f y rotatable upon the column, frctional-clamp--' u ing meansV interposed between the column* gdly binding'v said pa'rtsf) together,V a rock shaft at the baseoi' the i; 

